r financing activities and, as
>>21e cash flow. Free cash flow is defined as net cash provided by operating activities reduced by purchases of property and
d equipment and any capitalized software development costs. Cash outflows for employee payroll tax items related to the 
>>100net share settlement of equity awards are included in cash flow for financing activities and, as a result, do not have a
n effect on the calculation of free cash flow. Free cash flow margin is calculated as free cash flow as a percentage of 
>>34revenue. We believe these measures provide useful supplemental information to investors because they are indicators of t
he strength and performance of our core business operations. •Adjusted free cash flow. Adjusted free cash flow is define
>>24d as free cash flow plus (minus) net cash paid (received) on employer and employee payroll tax−related items o
n employee stock transactions. Employee payroll tax−related items on employee stock transactions are gen>>4